CN103469083A - Heat-resistant cast steel and application thereof - Google Patents
Heat-resistant cast steel and application thereof Download PDFInfo
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- CN103469083A CN103469083A CN2013104284506A CN201310428450A CN103469083A CN 103469083 A CN103469083 A CN 103469083A CN 2013104284506 A CN2013104284506 A CN 2013104284506A CN 201310428450 A CN201310428450 A CN 201310428450A CN 103469083 A CN103469083 A CN 103469083A
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Abstract
The invention relates to heat-resistant cast steel for a coke quenching car, belonging to the technical field of heat-resistant steel materials. The heat-resistant cast steel consists of the following components in percentage by weight: 0.15-0.25% of C, 0.3-0.8% of Si, 0.3-0.8% of Mn, 0.5-3.0% of Cr, 0.15-0.40% of V, 0.02-0.05% of Ti and the balance of Fe and inevitable impurities including S and P. The heat-resistant cast steel can ensure toughness, has good wear resistance, and can meet use requirements of the coke quenching car, and is simple in production process, low in Cr content and free of metal Ni, and the cost of the cast steel is greatly reduced. A steel plate prepared from the heat-resistant steel is used in the coke quenching car, the service life of the steel plate is more than 3.5 months, and the coke passing amount is more than 0.2 million tons.
Description
Technical field
The present invention relates to a kind of quenching car Heat resisting cast steel, belong to the heat-resisting steel material technical field.
Background technology
Quenching car is the support equipment of coke oven, generally runs on the track below the coke oven coke side, is used for accepting the coke of 1000 degrees centigrade of left and right of being derived by coke guiding locomotive.Quenching sweep working conditions is very severe, bears high temperature oxidation, burn into rapid heat cycle and violent scour wearing and tearing, usually makes the liner plate surface form crackle, and enlarges rapidly, until fracture failure.
At present the quenching mode of coke-oven plant mainly is divided into two kinds of wet quenching and dry quenching(of coke)s.The wet quenching sweep generally adopts heat resisting iron and spheroidal graphite cast iron material, and dry extinguishing coke pot liner plate used adopts the Heat resisting cast steel ZG35Cr24Ni7SiN in GB/T8492-87 more.
Heat resisting iron is to belong to the material that the industry standard is recommended use, and it has certain resistance to elevated temperatures and wear resistance and cost lower.Small-sized quenching car uses heat resisting iron plate (as RTSi5), and can reach 2～3 months work-ing life, and 100,000 tons of left and right of overfocus amount, can meet the use needs, and failure mode is thickness direction approximately 1/2～2/3 rear appearance fracture of wearing and tearing; But as large as the amount of the discharging of the coke (over 2 tons), the surging force fallen from coke oven due to coke is larger, and the weight of coke is large, and quenching sweep working conditions is more severe, adopts only about one week general work-ing life of common heat resisting iron plate, approximately 20,000 tons of overfocus amounts.
The spheroidal graphite cast iron advantage is that high temperature resistant property is good, wear resistance is good, cold & heat fatigue resisting is also good, large-scale quenching car generally adopts heat-proof nodular cast iron material (as RQTSi4 etc.), work-ing life can period of greater than two months, the overfocus amount is more than 200,000 tons, and its failure mode is that cold and hot fatigue crack growth becomes through-wall crack.But spheroidal graphite cast iron has different standard weave and nodularization rate, also therefore and difference is very large, so that actual production process is controlled is more complicated, cost is higher for performance.
Heat resisting cast steel ZG35Cr24Ni7SiN, its chemical composition is: C0.3-0.4%, Mn0.8-1.5%, Si1.3-2%, Cr23-25.5%, Ni7-8.5%, N0.2-0.8%.This cast steel has that good in oxidation resistance, intensity are high, good toughness, the advantages such as wear resistance, thermotolerance, solidity to corrosion and good casting property, but in use easily occur that the phenomenons such as fracture even appear in crackle, fusing, about its 2 months work-ing lifes, approximately 200,000 tons of overfocus amounts, failure mode is under the high temperature coke gouging abrasion, and more serious distortion and penetrating crack appear in liner plate.In addition, ZG35Cr24Ni7SiN is owing to containing higher nickel and chromium, and cost is higher.
For above-mentioned situation, in order to guarantee the productivity of coke-oven plant, it is very necessary studying the heat-resisting steel material that a kind of long service life, cost are low, production process is easy to control.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of Heat resisting cast steel.
Heat resisting cast steel of the present invention, by the one-tenth of following weight percent, be grouped into: C0.15～0.25%, Si0.3～0.8%, Mn0.3～0.8%, Cr0.5～3.0%, V0.15～0.40%, Ti0.02～0.05%, all the other are Fe and inevitable impurity S, P.
Preferably, the one-tenth by following weight percent is grouped into: C0.16～0.24%, Si0.35～0.75%, Mn0.35～0.75%, Cr0.52～2.97%, V0.16～0.39%, Ti0.022～0.048%, all the other are Fe and inevitable impurity S, P.
Preferred, by the one-tenth of following weight percent, be grouped into: C0.20%, Si0.55%, Mn0.55%, Cr1.75%, V0.30%, Ti0.035%, all the other are Fe and inevitable impurity S, P.
Wherein, described S≤0.05%, P≤0.045%.
Heat resisting cast steel of the present invention, can adopt lost foam casting produced.Foam is produced to the Cast Steel Plate mould by 2% reduced scale, mould coat and dry after can use.Melting adopts medium-frequency induction furnace, according to material, requires to calculate batching, adds ferrochrome, ferrosilicon, ferromanganese on the Normal Steel Casting basis, taps and adds vanadium iron and ferrotianium in first 5 minutes, obtains Heat resisting cast steel of the present invention.
Heat resisting cast steel of the present invention adds chromium, vanadium, titanium elements on existing Normal Steel Casting composition basis, in the situation that increase a small amount of cost, improves the mechanical property of steel, and production process is easy to control, and meets the needs of coking production.
Wherein, Cr is one of fundamental element of wear heat-resistant material, belongs to the alloying element that dwindles the γ phase region, and it and carbon form multiple carbide M23C6, M7C3, and to the performance of steel, especially the heat resistance of steel has remarkably influenced.Cr in certain content range, creep rupture strength and the creeping limit that can also improve steel.In addition, Cr's adds oxidation-resistance and the solidity to corrosion that can also improve steel.Under high-temperature work environment, guarantee wear resistance and certain antioxidant property of steel, must there is certain Cr content.Simultaneously, too high Cr content can promote precipitated phase to assemble and alligatoring, and thermostability descends and forms δ-ferrite simultaneously, thereby causes the reduction of heat resistance.Consider, getting Cr content is 0.5～3.0%.
Add V, Ti to improve intensity and the hardness of steel in the situation that do not reduce plasticity toughness, particularly improve heat resistance.V, Ti are carbides, and because their small-particle of carbide dispersion can play fixed action to austenite grain boundary, hinder the migration of austenite grain boundary, that is stoped Austenite Grain Growth, the effect that therefore also can play crystal grain thinning, improves the Coarsening Temperature of crystal grain; V and Ti have stronger precipitation strength ability, and their formed carbide hardness is high, and wear resistance is good; V and Ti acting in conjunction are better than the strengthening effect of single-element.But V, Ti too high levels can reduce cast steel toughness, increase cost.Consider, getting V content is that 0.15～0.40%, Ti content is 0.02～0.05%.
The present invention also provides the application of Heat resisting cast steel of the present invention in quenching car.
The cast steel that the present invention produces has wear resisting property preferably when guaranteeing toughness, can meet the service requirements of quenching car, and simultaneously, cast steel material production technique of the present invention is simple, and Cr content is low, and there is no metal Ni, its cost decrease.Heat resisting cast steel of the present invention is made into to steel plate for quenching car, can reaches its work-ing life more than 3.5 months, the overfocus amount reaches more than 200,000 tons.
Embodiment
Heat resisting cast steel of the present invention, by the one-tenth of following weight percent, be grouped into: C0.15～0.25%, Si0.3～0.8%, Mn0.3～0.8%, Cr0.5～3.0%, V0.15～0.40%, Ti0.02～0.05%, all the other are Fe and inevitable impurity S, P.
Preferably, the one-tenth by following weight percent is grouped into: C0.16～0.24%, Si0.35～0.75%, Mn0.35～0.75%, Cr0.52～2.97%, V0.16～0.39%, Ti0.022～0.048%, all the other are Fe and inevitable impurity S, P.
Preferred, by the one-tenth of following weight percent, be grouped into: C0.20%, Si0.55%, Mn0.55%, Cr1.75%, V0.30%, Ti0.035%, all the other are Fe and inevitable impurity S, P.
Wherein, described S≤0.05%, P≤0.045%.
Heat resisting cast steel of the present invention, can adopt lost foam casting produced.Foam is produced to the Cast Steel Plate mould by 2% reduced scale, mould coat and dry after can use.Melting adopts medium-frequency induction furnace, according to material, requires to calculate batching, adds ferrochrome, ferrosilicon, ferromanganese on the Normal Steel Casting basis, taps and adds vanadium iron and ferrotianium in first 5 minutes, obtains Heat resisting cast steel of the present invention.
Heat resisting cast steel of the present invention adds chromium, vanadium, titanium elements on existing Normal Steel Casting composition basis, in the situation that increase a small amount of cost, improves the mechanical property of steel, and production process is easy to control, and meets the needs of coking production.
Wherein, Cr is one of fundamental element of wear heat-resistant material, belongs to the alloying element that dwindles the γ phase region, and it and carbon form multiple carbide M23C6, M7C3, and to the performance of steel, especially the heat resistance of steel has remarkably influenced.Cr in certain content range, creep rupture strength and the creeping limit that can also improve steel.In addition, Cr's adds oxidation-resistance and the solidity to corrosion that can also improve steel.Under high-temperature work environment, guarantee wear resistance and certain antioxidant property of steel, must there is certain Cr content.Simultaneously, too high Cr content can promote precipitated phase to assemble and alligatoring, and thermostability descends and forms δ-ferrite simultaneously, thereby causes the reduction of heat resistance.Consider, getting Cr content is 0.5～3.0%.
Add V, Ti to improve intensity and the hardness of steel in the situation that do not reduce plasticity toughness, particularly improve heat resistance.V, Ti are carbides, and because their small-particle of carbide dispersion can play fixed action to austenite grain boundary, hinder the migration of austenite grain boundary, that is stoped Austenite Grain Growth, the effect that therefore also can play crystal grain thinning, improves the Coarsening Temperature of crystal grain; V and Ti have stronger precipitation strength ability, and their formed carbide hardness is high, and wear resistance is good; V and Ti acting in conjunction are better than the strengthening effect of single-element.But V, Ti too high levels can reduce cast steel toughness, increase cost.Consider, getting V content is that 0.15～0.40%, Ti content is 0.02～0.05%.
The present invention also provides the application of Heat resisting cast steel of the present invention in quenching car.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
Embodiment 1
According to quenching car drawing casting quenching sweep, control its composition, the Heat resisting cast steel plate composition of producing is, C0.16%, Si0.35%, Mn0.35%, S≤0.05%, P≤0.045%, Cr0.52%, V0.16%, Ti0.022%, all the other are Fe.By this Heat resisting cast steel plate, for the wet quenching car, reach 3 months work-ing life, and the overfocus amount reaches more than 200,000 tons, the steel plate edge has crackle to occur, but penetrating crack do not occur, and the quenching car liner plate has the noticeable wear attenuate, worn out situation do not occur, can meet need of production.
Embodiment 2
According to quenching car drawing casting quenching sweep, control its composition, the Heat resisting cast steel plate composition of producing is, C0.24%, Si0.75%, Mn0.75%, S≤0.05%, P≤0.045%, Cr2.97%, V0.39%, Ti0.048%, all the other are Fe.This Heat resisting cast steel plate, for the wet quenching car, is reached more than 3 months work-ing life, and the overfocus amount reaches more than 200,000 tons, and the steel plate edge has crackle to occur, but penetrating crack and crack conditions do not occur, can meet need of production.
Embodiment 3
According to quenching car drawing casting quenching sweep, control its composition, the Heat resisting cast steel plate composition of producing is, C0.20%, Si0.55%, Mn0.55%, S≤0.05%, P≤0.045%, Cr1.75%, V0.30%, Ti0.035%, all the other are Fe.This Heat resisting cast steel plate, for the dry quenching(of coke) car, is reached more than 3.5 months work-ing life, and the overfocus amount reaches more than 250,000 tons, and steel plate has certain distortion, and edge has crackle to occur, but fracture and worn out situation do not occur, can meet need of production.
Comparative Examples 1
According to the quenching car drawing casting quenching sweep of embodiment 3, its material adopts existing Heat resisting cast steel ZG35Cr24Ni7SiN.By this Heat resisting cast steel plate, for the dry quenching(of coke) car, be 2 months work-ing life, approximately 200,000 tons of overfocus amounts, and failure mode is under the high temperature coke gouging abrasion, more serious distortion and penetrating crack appear in liner plate.
From embodiment 3 and Comparative Examples 1, can clearly find out, under equal conditions, the quenching car liner plate that uses Heat resisting cast steel plate of the present invention to make, its work-ing life is more more than 50,000 tons than existing ZG35Cr24Ni7SiN overfocus amount, and, Heat resisting cast steel Cr content of the present invention is low, and there is no metal Ni, its cost decrease.
Claims (5)
1. Heat resisting cast steel, it is characterized in that, one-tenth by following weight percent is grouped into: C0.15～0.25%, Si0.3～0.8%, Mn0.3～0.8%, Cr0.5～3.0%, V0.15～0.40%, Ti0.02～0.05%, all the other are Fe and inevitable impurity S, P.
2. Heat resisting cast steel according to claim 1, it is characterized in that, one-tenth by following weight percent is grouped into: C0.16～0.24%, Si0.35～0.75%, Mn0.35～0.75%, Cr0.52～2.97%, V0.16～0.39%, Ti0.022～0.048%, all the other are Fe and inevitable impurity S, P.
3. Heat resisting cast steel according to claim 2, is characterized in that, by the one-tenth of following weight percent, be grouped into: C0.20%, Si0.55%, Mn0.55%, Cr1.75%, V0.30%, Ti0.035%, all the other are Fe and inevitable impurity S, P.
4. according to the described Heat resisting cast steel of claim 1-3 any one, it is characterized in that: described S≤0.05%, P≤0.045%.
5. the application of the described Heat resisting cast steel of any one in quenching car in claim 1-4.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543663A (en) * | 2015-12-28 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Preparation method of alloy vehicle door hinge |
| CN109666865A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Alloy and its preparation method and application with anticoking capability |
| CN113549829A (en) * | 2021-07-13 | 2021-10-26 | 山西滨腾机械有限公司 | Dry coke quenching tank lining plate and preparation method and application thereof |
| CN114378260A (en) * | 2022-01-17 | 2022-04-22 | 新密蓝火激光科技有限公司 | Dry/water quenching lining plate and preparation method and application thereof |
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| JPH06256896A (en) * | 1993-03-09 | 1994-09-13 | Nkk Corp | Wear-resistant steel excellent in surface property and its production |
| JPH0892687A (en) * | 1994-09-22 | 1996-04-09 | Kobe Steel Ltd | High strength and high toughness non-heattreated steel for hot forging and its production |
| CN102851593A (en) * | 2011-06-28 | 2013-01-02 | 新东工业株式会社 | Low carbon cast steel pellet |
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2013
- 2013-09-18 CN CN201310428450.6A patent/CN103469083B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06256896A (en) * | 1993-03-09 | 1994-09-13 | Nkk Corp | Wear-resistant steel excellent in surface property and its production |
| JPH0892687A (en) * | 1994-09-22 | 1996-04-09 | Kobe Steel Ltd | High strength and high toughness non-heattreated steel for hot forging and its production |
| CN102851593A (en) * | 2011-06-28 | 2013-01-02 | 新东工业株式会社 | Low carbon cast steel pellet |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543663A (en) * | 2015-12-28 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Preparation method of alloy vehicle door hinge |
| CN109666865A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Alloy and its preparation method and application with anticoking capability |
| CN113549829A (en) * | 2021-07-13 | 2021-10-26 | 山西滨腾机械有限公司 | Dry coke quenching tank lining plate and preparation method and application thereof |
| CN113549829B (en) * | 2021-07-13 | 2022-12-20 | 山西滨腾机械有限公司 | Dry coke quenching tank lining plate and preparation method and application thereof |
| CN114378260A (en) * | 2022-01-17 | 2022-04-22 | 新密蓝火激光科技有限公司 | Dry/water quenching lining plate and preparation method and application thereof |
| CN114378260B (en) * | 2022-01-17 | 2023-09-26 | 新密蓝火激光科技有限公司 | Dry/water quenching Jiao Chenban and preparation method and application thereof |
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| CN103469083B (en) | 2015-06-10 |
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Effective date of registration: 20200521 Address after: 213000 No.8, Changfeng Road, Dingyan street, Changzhou Economic Development Zone, Jiangsu Province Patentee after: Changzhou Changlin Yongqing Foundry Co.,Ltd. Address before: 617000 Airport Road, Panzhihua, Sichuan, No. 10 Patentee before: PANZHIHUA University |